hey i did this assignment this is how you should do it:
Salutations, Mr. Beethoven
I loved your playing. It was amazing, I hope you can come and play for me again. My favorite song was moonlight sonata.
that should be your intro explane why you want him to come back and what you pictured while he played the piece. (ballerinas, rain, a panio in a medow ect.) i have so many spelling mistakes, but you get the picture